GHSA-8jjh-j3c2-cjcv
HIGHGHSA-8jjh-j3c2-cjcv is a high-severity (CVSS 7.5) Cross-site Scripting (XSS) vulnerability in statamic/cms. O3 Security confirms whether GHSA-8jjh-j3c2-cjcv is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Cross-site Scripting via uploaded assets
Blast Radius
statamic/cms🐘statamic/cmsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Impact
HTML files crafted to look like images may be uploaded regardless of mime validation. This is only applicable on front-end forms using the "Forms" feature containing an assets field, or within the control panel which requires authentication.
Patches
It has been patched on 3.4.15 and 4.36.0.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | statamic/cms | all versions | 3.4.15 |
| 🐘Packagist | statamic/cms | ≥ 4.0.0&&< 4.36.0 | 4.36.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for statamic/cms. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update statamic/cms to 3.4.15 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8jjh-j3c2-cjcv is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-8jjh-j3c2-cjcv is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-8jjh-j3c2-cjcv. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-8jjh-j3c2-cjcv in your dependencies?
O3 detects GHSA-8jjh-j3c2-cjcv across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.